Sounds like a miss-fire to me, after sitting 9 years there could be alot of things to cause that.

Clean the MAF sensor, check the coil, check the oxygen sensor, check the EGR function to be sure its fully closed when it should be, replace the fuel filter, change the oil and filter, fill the tank with good quality fuel, take it to the race track and flog the tits off it for about 150-200 miles. That should clear its throat.